“This superb book traces the history of the debate over the levels at which natural selection operates. Evolutionists, knowing that the secrets of the present are to be explained by the past, will welcome this work for the great insights that it throws on contemporary debates.”

Michael Ruse, Florida State University

“Few issues in biological theory have excited political commentators and the educated public as much as group selection. Whether nature teaches a liberal or a conservative view of human society once seemed to turn on this question. This readable but scholarly history of the debate debunks some myths and reveals how biologists at the center of the controversy were influenced by their fieldwork, by the developing theoretical context, and by the social issues of the day. It will be fascinating reading for biologists, as well as historians of science and a wide audience in the humanities and social sciences.”

Paul E. Griffiths, University of Sydney

“Mark Borrello has filled a much-needed gap in the literature on the issue of group selection, by focusing on one of the subject’s earliest and most vociferous advocates, V. C. Wynne-Edwards. A philosopher of science who writes good history, and a historian of science who writes clear and comprehensible philosophy, Borrello takes the reader carefully through the history of group selectionist ideas, starting with Darwin, through Wynne-Edwards’s formulation of the idea, especially in his 1962 book, Animal Dispersion, and reactions to it. This book is a must-read for anyone interested in the history of a highly controversial, and little studied, aspect of the evolutionary synthesis.”

Garland E. Allen, Washington University in St. Louis

“Philosophers have expended tremendous energy immersed in controversies about the levels at which natural selection acts, often acting as if this were a theoretical problem to be solved philosophically. In this delightfully accessible volume, Borrello very effectively places in clear historical context the contributions of the leading group selectionist Wynne-Edwards and his interactions with contemporaries. Borrello makes an important contribution to the ongoing discussions about selection, and provides an outstanding example of what is gained by joining first-rate history and philosophy of science.”

Jane Maienschein, Arizona State University

“A fascinating study. . . . Recommended.”

J. S. Schwartz | Choice

“This excellent new book on the history of the debate over group selection is part of an ongoing effort by historians and philosophers to give a more nuanced accounting of the complicated historical and conceptual development of modern evolutionary thought than has been offered in the past. . . . [Borrello’s] account gives us more than just a genealogy of a particular scientific idea: the history of group selection is a case study that illuminates how scientific consensus is negotiated, and how orthodoxies are defended and maintained. . . . [Evolutionary Restraints] will be read with profit both by observers of and active participants in current debates about the nature and scope of selection.”

David Sepkoski | Quarterly Review of Biology